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When I travel there I noticed that if I am roaming on the mobile network (with U.S. carrier SIM card but service provided via China Unicom), Facebook was access
by devy 9y ago
When I travel there I noticed that if I am roaming on the mobile network (with U.S. carrier SIM card but service provided via China Unicom), Facebook was accessible, do you know why?
- TorKlingberg 9y agoYou data is routed as phone network data to your U.S. carrier, who has the gateway to the internet. This is because mobile data protocols were originally not designed with the Internet in mind, but as a separate network. The internet gateways were added on later.